CHAMPAIGN, Ill. – One of two Oshkosh Jimmy John's restaurants is among the more than 200 shops that had customer credit card data stolen between June and September.

The Jimmy John's at 70 Wisconsin St. was identified as one of the 216 locations affected by a data breach. In total, five Wisconsin locations in Oshkosh, Milwaukee, River Falls, Sheboygan and Portage were included in information on the breach Jimmy John's released Wednesday.

The Champaign, Illinois-based chain said in a news release that stores in 37 states across the United States were affected. It did not say how many customers are affected.

Jimmy John's believes someone stole log-in credentials and remotely installed malware on machines used to swipe credit cards. Some customers' credit card numbers, expiration dates, verification codes and names were stolen between June 16 and Sept. 15, the company said.

The privately held company said it discovered the problem on July 30.

Jimmy John's said it believes its security has been restored by installing encrypted swipe machines and taking other steps.